Answer:To simplify the given expression (-4x² + 7x) + (5x² + x), we need to combine like terms by adding or subtracting the coefficients of the same variables. Let's do it step by step: 1. Combine the terms with x²:(-4x² + 7x) + (5x² + x)= (-4x² + 5x²) + (7x + x)= 1x² + 8x2. Final simplified expression:1x² + 8xStep-by-step explanation:I Hope It's Helpful for you